From dec6a2846241cfd054acbcb601deca997fd4d447 Mon Sep 17 00:00:00 2001
From: schalyanagaraju <schalyanagaraju@ebay.com>
Date: Fri, 28 Dec 2018 10:47:51 -0800
Subject: [PATCH] Fixing bug :
 https://issues.apache.org/jira/browse/MAPREDUCE-7089

---
 .../src/test/java/org/apache/hadoop/fs/TestDFSIO.java          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/fs/TestDFSIO.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/fs/TestDFSIO.java
index 10709bec0fe..28ae2e4522e 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/fs/TestDFSIO.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/fs/TestDFSIO.java
@@ -547,6 +547,9 @@ public class TestDFSIO implements Tool {
                        String name, 
                        long totalSize // in bytes
                      ) throws IOException {
+      if (bufferSize <= 0) {
+        throw new IllegalArgumentException("Buffer size must be greater than 0");
+      }
       InputStream in = (InputStream)this.stream;
       long actualSize = 0;
       while (actualSize < totalSize) {